I am working on French now, I have always loved the language, and my nephew speaks it now, so I can keep in practice if I continue with it.
I have also always wanted to learn Russian, why I do not know.
I would like to at least understand basic Arabic...honestly just to mess with the local store owners who frequently speak Arabic when I am in their stores...lol
Edit: Not to speak, obviously, but for studying, I would love to learn some Latin, Ancient Greek and Hebrew as well.